苗期栽培大豆Cl^-耐性的遗传分析  

INHERITANCE OF Cl^- TOLERANCE OF GLYCINE MAX CULTIVARS IN SEEDLINGS

作　　者：罗庆云[1] 刘友良[2] 章元明[1] 薛艳玲[2] 张艳[2] 

机构地区：[1]南京农业大学农学院作物遗传与种质创新国家重点实验室,南京210095 [2]南京农业大学生命科学学院

出　　处：《大豆科学》2006年第4期390-394,共5页Soybean Science

基　　金：国家自然科学基金(39870069);农业部植物营养与养分循环重点开放实验室开放基金资助项目

摘　　要：NaCl胁迫下栽培大豆所受的离子胁迫作用主要是由Cl-毒害所引起的,可以通过改良栽培大豆的Cl-敏感性来提高栽培大豆的耐盐性。本研究对栽培大豆品种南农1138-2、南农88-31和Jackson间配制的2个杂交组合的P1、P2、F1、F2和F2∶3世代的Cl-耐性进行了调查,并利用主基因+多基因混合遗传模型联合分离分析方法分析栽培大豆的Cl-耐性遗传规律。结果表明,南农88-31×Jackson和南农1138-2×南农88-31的Cl-耐性遗传都符合D-0模型,即上述两组合的Cl-耐性都受1对加性-显性主基因控制,同时也受加性-显性-上位性多基因控制。南农88-31×Jackson组合的主基因和多基因加性效应都高于南农1138-2×南农88-31组合。但是,其主基因和多基因显性效应远低于南农1138-2×南农88-31组合。从F2∶3估计的主基因遗传力分别为0.54%和18.23%,估计的微效基因遗传力分别为83.56%和16.32%。表明,可以利用Cl-耐性强的大豆亲本配制杂交组合,并且在育种的早期阶段选育Cl-耐性强的单株或家系,以获得耐盐性高的栽培大豆品种。Stress of NaCl on seedlings of soybean cultivars was mainly coursed by Cl^-, and we oulel improve salt tolerance of soybean cultivars by amelioration of the Cl^- sensitive of cultivars. Inheritance of Cl^- tolerance in P1 、P2 、F1、.F2 and F2：3 from two crosses of Nannong 88-31× Jackson and Nannong 1138-2 × Nannong 88-31 were investigated by the mixed major gene plus poly-gene inheritance model of quantitative traits. The joint analyses results showed that the Cl^- tolerance of this two crosses were both controlled by a major gene and minor genes （the D-0 model）. And the values of additive effect of the major gene and the minor genes of Nannong 88-31× Jackson were higher than those of Nannong 1138-2 ×Nannong 88-31, but the values of dominance effects of the major gene and the minor ones of Nannong 88-31× Jackson were lower than those of the latter crosse. In F2,3 from cross of Nannong 88-31× Jackson and Nannong 1138-2 × Nannong 88-31, the heritability values of the major gene were estimated as 0.54% and 18.23%, respectively. And those of the minor genes were estimated as 83.56% and 16.32%, respectively. Thus, it was possible for us to breed Cl^- tolerant soybean cultivars by choosing Cl^- tolerant parents and handling segregating generation.

关 键 词：栽培大豆 Cl^-耐性 遗传 主基因+多基因遗传模型 多世代联合分离分析 

分 类 号：S565.1[农业科学—作物学] S332.6